Discrete semiconductor devices (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How much energy do semiconductors need for charge movement compared to conductors and insulators?
How much energy do semiconductors need for charge movement compared to conductors and insulators?
Small amount
What distinguishes N-type semiconductors from P-type semiconductors?
What distinguishes N-type semiconductors from P-type semiconductors?
N-type has excess conduction electrons
What is the primary function of the Gate terminal in a MOSFET?
What is the primary function of the Gate terminal in a MOSFET?
Controls the switching action
Which MOSFET terminal is connected to the positive terminal in a circuit?
Which MOSFET terminal is connected to the positive terminal in a circuit?
Drain
In which operating region does the MOSFET act as an open switch?
In which operating region does the MOSFET act as an open switch?
Cut-off region when
In the saturation region, what does the drain-source current depend on?
In the saturation region, what does the drain-source current depend on?
rather than
What is the purpose of the threshold voltage () in a MOSFET?
What is the purpose of the threshold voltage () in a MOSFET?
Voltage needed to form conducting channel
Why is a protection diode used with inductive loads in MOSFET circuits?
Why is a protection diode used with inductive loads in MOSFET circuits?
Prevents back-emf from damaging MOSFET
What role does the depletion zone play at a p-n junction?
What role does the depletion zone play at a p-n junction?
Acts as insulator blocking charge flow
Why might a resistor be placed between the Gate and ground in a MOSFET circuit?
Why might a resistor be placed between the Gate and ground in a MOSFET circuit?
To discharge excess electrostatic charge